Road vehicles - Diagnostic systems - Part 2: CARB requirements for interchange of digital information - Amendment 1

Contains minor amendments in three subclauses.

Véhicules routiers — Systèmes de diagnostic — Partie 2: Caractéristiques CARB de l'échange de données numériques — Amendement 1

General Information

Status
Published
Publication Date
27-Nov-1996
ICS
43.180 - Diagnostic, maintenance and test equipment
Technical Committee
ISO/TC 22/SC 31 - Data communication
Drafting Committee
ISO/TC 22/SC 31/WG 2 - Vehicle diagnostic protocols
Current Stage
6060 - International Standard published
Start Date
28-Nov-1996
Completion Date
13-Dec-2025

Relations

Amends
ISO 9141-2:1994 - Road vehicles - Diagnostic systems - Part 2: CARB requirements for interchange of digital information
Effective Date
06-Jun-2022
Child
ISO 9141-2:1994 - Road vehicles - Diagnostic systems - Part 2: CARB requirements for interchange of digital information
Effective Date
15-Apr-2008

Overview

ISO 9141-2:1994/Amd 1:1996 is an international standard amendment that focuses on road vehicle diagnostic systems. Specifically, it details the CARB (California Air Resources Board) requirements for the interchange of digital information between diagnostic equipment and vehicle electronic systems. This amendment introduces minor but critical changes to enhance data transmission protocols within automotive diagnostics, promoting accuracy and interoperability of electronic diagnostic tools.

Developed by ISO Technical Committee ISO/TC 22, Subcommittee SC 3 on Electrical and Electronic Equipment, this amendment builds upon the first edition of ISO 9141-2 (1994) to ensure compliance with evolving industry needs.

Key Topics

  • Digital Information Interchange
    The amendment updates parameters governing the exchange of digital information between diagnostic systems and road vehicles to maintain efficient data communication.

  • Transmission Rate Specification
    Specifies a strict transmission rate of 10.4 kbit/s ± 0.5%, ensuring consistent communication speed for diagnostic message transfers.

  • Tolerance Levels on Transmission Speeds
    Sets the tolerance for transmission speeds at ± 1.7%, standardizing the range within which diagnostic tools must operate for reliability.

  • Electrical Characteristics Adjustment
    Minor formula corrections on electrical components, such as capacitance and bandwidth parameters, to refine signal quality during transmission.

  • CARB Compliance
    Ensures that road vehicle diagnostic protocols meet CARB requirements, contributing to emissions control and regulatory adherence within the automotive sector.

Applications

  • Automotive Diagnostic Tools
    Vehicle service centers and manufacturers utilize ISO 9141-2 standards for designing scan tools and diagnostic readers that communicate seamlessly with vehicle onboard systems.

  • Emissions Testing and Monitoring
    By aligning with CARB standards, this amendment supports environmental agencies and testers in verifying vehicle compliance with emission regulations.

  • Vehicle Electronic Control Units (ECUs)
    Helps ECU designers and programmers establish reliable diagnostic data links, enhancing vehicle fault detection and maintenance efficiency.

  • Interoperability Between Manufacturers
    Standardized digital communication protocols support compatibility across different vehicle brands and diagnostic equipment models, simplifying servicing operations globally.

Related Standards

  • ISO 9141-1
    Specifies voltage and signal requirements for road vehicle diagnostics, complementing the interchange protocols of Part 2.

  • ISO 14230 (Keyword Protocol 2000)
    Builds on ISO 9141 framework with advanced diagnostic communication for vehicle systems.

  • ISO 15031
    Provides guidelines for diagnostic communication over vehicle networks targeting emissions-related diagnostics.

  • SAE J1850
    Another diagnostic communication standard used primarily in North American vehicles, often referenced alongside ISO 9141 standards.

Keywords: ISO 9141-2 Amendment 1, road vehicle diagnostics, CARB digital information interchange, automotive diagnostic systems, transmission rate, vehicle electronic communication, emissions testing standard, ECU diagnostics, automotive digital protocols

Frequently Asked Questions

ISO 9141-2:1994/Amd 1:1996 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - Diagnostic systems - Part 2: CARB requirements for interchange of digital information - Amendment 1". This standard covers: Contains minor amendments in three subclauses.

Contains minor amendments in three subclauses.

ISO 9141-2:1994/Amd 1:1996 is classified under the following ICS (International Classification for Standards) categories: 43.180 - Diagnostic, maintenance and test equipment. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 9141-2:1994/Amd 1:1996 has the following relationships with other standards: It is inter standard links to ISO 9141-2:1994; is excused to ISO 9141-2:1994. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO 9141-2:1994/Amd 1:1996 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL
IS0
STANDARD
9141-2
First edition
1994-02-01
AMENDMENT 1
1996-l 2-01
Road vehicles - Diagnostic systems -
Part 2:
CARB requirements for interchange of digital
information
AMENDMENT 1
- Systemes de diagnostic -
V6hicules routiers
Partie 2: Caract&istiques CARB de &change de don&es numkiques
AMENDEMENT 7
Reference number
IS0 9141-2:1994/Amd.l:1996(E)
IS0 914%2:1994/Amd.l:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
Amendment 1 to International Standard IS0 9141
...


NORME
ISO
INTERNATIONALE
9141-2
Première édition
1994-02-01
AMENDEMENT 1
1996-I 2-01
Véhicules routiers - Systèmes de
diagnostic -
Partie 2:
Caractéristiques CARB de l’échange de
données numériques
AMENDEMENT 1
Road vehicles - Diagnostic systems -
Part 2: CA RB requiremen ts for in terchange of digital information
AMENDMENT 1
Numéro de référence
ISO 9141-2:1994/Amd.l:1996(F)
ISO 91452:1994/Amd.l:1996(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiée aux
comités techniques de I’ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique créé à cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent également aux travaux. L’ISO colla-
bore étroitement avec la Commission électrotechnique internationale (CEI)
en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des co-
mités membres votants.
L’Amendement 1 à la Norme internationale ISO 9141-2:1994 a été élaboré
par le comité te
...


NORME
ISO
INTERNATIONALE
9141-2
Première édition
1994-02-01
AMENDEMENT 1
1996-I 2-01
Véhicules routiers - Systèmes de
diagnostic -
Partie 2:
Caractéristiques CARB de l’échange de
données numériques
AMENDEMENT 1
Road vehicles - Diagnostic systems -
Part 2: CA RB requiremen ts for in terchange of digital information
AMENDMENT 1
Numéro de référence
ISO 9141-2:1994/Amd.l:1996(F)
ISO 91452:1994/Amd.l:1996(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiée aux
comités techniques de I’ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique créé à cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent également aux travaux. L’ISO colla-
bore étroitement avec la Commission électrotechnique internationale (CEI)
en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des co-
mités membres votants.
L’Amendement 1 à la Norme internationale ISO 9141-2:1994 a été élaboré
par le comité te
...

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